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Ide M, Saito I, Sanbo M, Kanatsu-Shinohara M, Shinohara T, Hirabayashi M, Hochi S. Lower developmental potential of rat zygotes produced by ooplasmic injection of testicular spermatozoa versus cauda epididymal spermatozoa. J Reprod Dev 2024; 70:254-258. [PMID: 38735740 PMCID: PMC11310386 DOI: 10.1262/jrd.2024-030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 04/18/2024] [Indexed: 05/14/2024] Open
Abstract
Intracytoplasmic sperm injection (ICSI) is clinically used to treat obstructive/nonobstructive azoospermia. This study compared the efficacy of ICSI with cauda epididymal and testicular sperm in Wistar (WI) and Brown-Norway (BN) rats. The transfer of ICSI oocytes with cryopreserved epididymal and testicular WI sperm resulted in offspring production of 26.2% and 3.7%-4.7%, respectively (P < 0.05). Treatments for artificial oocyte activation (AOA) and acrosome removal improved pronuclear formation in BN-ICSI oocytes; however, only AOA treatment was effective in producing offspring (3.7%-6.5%). In the case of ICSI with testicular sperm (TESE-ICSI), one offspring (0.6%) was derived from the BN-TESE-ICSI oocytes. The application of AOA or a hypo-osmotic sperm suspension did not improve the production of TESE-ICSI offspring. Thus, outbred WI rat offspring can be produced by using ICSI and less efficiently by using TESE-ICSI. Challenges in producing offspring by using ICSI/TESE-ICSI in inbred BN strain require further investigation.
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Affiliation(s)
- Misuzu Ide
- Graduate School of Science and Technology, Shinshu University, Nagano 386-8567, Japan
- National Institute for Physiological Sciences, Aichi 444-8787, Japan
| | - Ibuki Saito
- Graduate School of Science and Technology, Shinshu University, Nagano 386-8567, Japan
| | - Makoto Sanbo
- National Institute for Physiological Sciences, Aichi 444-8787, Japan
| | | | - Takashi Shinohara
- Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Masumi Hirabayashi
- National Institute for Physiological Sciences, Aichi 444-8787, Japan
- Graduate Institute for Advanced Studies, SOKENDAI, Aichi 444-8787, Japan
| | - Shinichi Hochi
- Graduate School of Science and Technology, Shinshu University, Nagano 386-8567, Japan
- Faculty of Textile Science and Technology, Shinshu University, Nagano 386-8567, Japan
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2
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Matsumura T, Katagiri K, Yao T, Ishikawa-Yamauchi Y, Nagata S, Hashimoto K, Sato T, Kimura H, Shinohara T, Sanbo M, Hirabayashi M, Ogawa T. Generation of rat offspring using spermatids produced through in vitro spermatogenesis. Sci Rep 2023; 13:12105. [PMID: 37495678 PMCID: PMC10372019 DOI: 10.1038/s41598-023-39304-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 07/23/2023] [Indexed: 07/28/2023] Open
Abstract
An in vitro spermatogenesis method using mouse testicular tissue to produce fertile sperm was established more than a decade ago. Although this culture method has generally not been effective in other animal species, we recently succeeded in improving the culture condition to induce spermatogenesis of rats up to the round spermatid stage. In the present study, we introduced acrosin-EGFP transgenic rats in order to clearly monitor the production of haploid cells during spermatogenesis in vitro. In addition, a metabolomic analysis of the culture media during cultivation revealed the metabolic dynamics of the testis tissue. By modifying the culture media based on these results, we were able to induce rat spermatogenesis repeatedly up to haploid cell production, including the formation of elongating spermatids, which was confirmed histologically and immunohistochemically. Finally, we performed a microinsemination experiment with in vitro produced spermatids, which resulted in the production of healthy and fertile offspring. This is the first demonstration of the in vitro production of functional haploid cells that yielded offspring in animals other than mice. These results are expected to provide a basis for the development of an in vitro spermatogenesis system applicable to many other mammals.
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Affiliation(s)
- Takafumi Matsumura
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
| | - Kumiko Katagiri
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
| | - Tatsuma Yao
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
- Research and Development Center, Fuso Pharmaceutical Industries, Ltd., 2-3-30 Morinomiya, Joto-ku, Osaka, 536-8523, Japan
| | - Yu Ishikawa-Yamauchi
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
| | - Shino Nagata
- Laboratory of Biopharmaceutical and Regenerative Sciences, Institute of Molecular Medicine and Life Science, Yokohama City University Association of Medical Science, Yokohama, Kanagawa, 230-0045, Japan
| | - Kiyoshi Hashimoto
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
- Department of Urology, Yokohama City University School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
| | - Takuya Sato
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan
| | - Hiroshi Kimura
- Micro/Nano Technology Center, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan
| | - Takashi Shinohara
- Department of Molecular Genetics, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Makoto Sanbo
- Center for Genetic Analysis of Behavior, National Institute for Physiological Sciences, Okazaki, Aichi, 444-8787, Japan
| | - Masumi Hirabayashi
- Center for Genetic Analysis of Behavior, National Institute for Physiological Sciences, Okazaki, Aichi, 444-8787, Japan.
| | - Takehiko Ogawa
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan.
- Department of Urology, Yokohama City University School of Medicine, Yokohama, Kanagawa, 236-0004, Japan.
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3
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TORIKAI K, SHIMIZU K, NAGATOMO H, KASAI M, KATO-ITOH M, KAMADA Y, SHIBASAKI I, JEON H, KIKUCHI R, WAKAYAMA S, SUCHY F, NAKAUCHI H, WAKAYAMA T, MIZUTANI E. Removal of sperm tail using trypsin and pre-activation of oocyte facilitates intracytoplasmic sperm injection in mice and rats. J Reprod Dev 2023; 69:48-52. [PMID: 36529517 PMCID: PMC9939287 DOI: 10.1262/jrd.2022-065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
We examined various methods to enhance the accessibility of intracytoplasmic sperm injection (ICSI) technology to more users by making the technique easier, more efficient, and practical. First, the methods for artificially removing the mouse sperm tail were evaluated. Trypsin treatment was found to efficiently remove the sperm tails. The resultant sperm cells had a lower oocyte activation capacity; however, the use of activated oocytes resulted in the same fecundity as that of fresh, untreated sperm. Pre-activated oocytes were more resistant to physical damage, showed higher survival rates, and required less time per injection. Testing this method in rats yielded similar results, although the oocyte activation method was different. Remarkably, this method resulted in higher birth rates of rat progeny than with conventional methods of rat ICSI. Our method thereby streamlines mouse and rat ICSI, making it more accessible to laboratories across many disciplines.
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Affiliation(s)
- Kohei TORIKAI
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Kazuma SHIMIZU
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Hiroaki NAGATOMO
- Center for Life Science Research, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Mariko KASAI
- Stem Cell Therapy Laboratory, Advanced Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Megumi KATO-ITOH
- Division of Stem Cell Therapy, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Yuko KAMADA
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Ikue SHIBASAKI
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Hyojung JEON
- Laboratory of Stem Cell Therapy, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Riko KIKUCHI
- Laboratory of Stem Cell Therapy, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Sayaka WAKAYAMA
- Advanced Biotechnology Center, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Fabian SUCHY
- Institute for Stem Cell Biology and Regenerative Medicine, Department of Genetics, Stanford University School of Medicine, California 94305, USA
| | - Hiromitsu NAKAUCHI
- Stem Cell Therapy Laboratory, Advanced Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan,Institute for Stem Cell Biology and Regenerative Medicine, Department of Genetics, Stanford University School of Medicine, California 94305, USA
| | - Teruhiko WAKAYAMA
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan,Advanced Biotechnology Center, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Eiji MIZUTANI
- Stem Cell Therapy Laboratory, Advanced Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan,Laboratory of Stem Cell Therapy, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
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4
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Takeo T, Nakao S, Mikoda N, Yamaga K, Maeda R, Tsuchiyama S, Nakatsukasa E, Nakagata N. Optimized protocols for sperm cryopreservation and in vitro fertilization in the rat. Lab Anim (NY) 2022; 51:256-274. [DOI: 10.1038/s41684-022-01053-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 08/15/2022] [Indexed: 11/05/2022]
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5
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Zvick J, Tarnowska-Sengül M, Ghosh A, Bundschuh N, Gjonlleshaj P, Hinte LC, Trautmann CL, Noé F, Qabrati X, Domenig SA, Kim I, Hennek T, von Meyenn F, Bar-Nur O. Exclusive generation of rat spermatozoa in sterile mice utilizing blastocyst complementation with pluripotent stem cells. Stem Cell Reports 2022; 17:1942-1958. [PMID: 35931077 PMCID: PMC9481912 DOI: 10.1016/j.stemcr.2022.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
Blastocyst complementation denotes a technique that aims to generate organs, tissues, or cell types in animal chimeras via injection of pluripotent stem cells (PSCs) into genetically compromised blastocyst-stage embryos. Here, we report on successful complementation of the male germline in adult chimeras following injection of mouse or rat PSCs into mouse blastocysts carrying a mutation in Tsc22d3, an essential gene for spermatozoa production. Injection of mouse PSCs into Tsc22d3-Knockout (KO) blastocysts gave rise to intraspecies chimeras exclusively embodying PSC-derived functional spermatozoa. In addition, injection of rat embryonic stem cells (rESCs) into Tsc22d3-KO embryos produced interspecies mouse-rat chimeras solely harboring rat spermatids and spermatozoa capable of fertilizing oocytes. Furthermore, using single-cell RNA sequencing, we deconstructed rat spermatogenesis occurring in a mouse-rat chimera testis. Collectively, this study details a method for exclusive xenogeneic germ cell production in vivo, with implications that may extend to rat transgenesis, or endangered animal species conservation efforts.
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Affiliation(s)
- Joel Zvick
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Monika Tarnowska-Sengül
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Adhideb Ghosh
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland; Functional Genomics Center Zurich, ETH Zurich and University of Zurich, Zurich 8057, Switzerland
| | - Nicola Bundschuh
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Pjeter Gjonlleshaj
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Laura C Hinte
- Laboratory of Nutrition and Metabolic Epigenetics, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Christine L Trautmann
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Falko Noé
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland; Functional Genomics Center Zurich, ETH Zurich and University of Zurich, Zurich 8057, Switzerland
| | - Xhem Qabrati
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Seraina A Domenig
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Inseon Kim
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Thomas Hennek
- ETH Phenomics Center, ETH Zurich, Zurich 8049, Switzerland
| | - Ferdinand von Meyenn
- Laboratory of Nutrition and Metabolic Epigenetics, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland
| | - Ori Bar-Nur
- Laboratory of Regenerative and Movement Biology, Department of Health Sciences and Technology, ETH Zurich, Schwerzenbach 8603, Switzerland.
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6
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Nakagawa Y, Kaneko T. Treatment with MG132 prevents spontaneous activation of rat oocyte in culture and promotes embryonic development after intracytoplasmic sperm injection. Sci Rep 2022; 12:2706. [PMID: 35177721 PMCID: PMC8854420 DOI: 10.1038/s41598-022-06714-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 02/04/2022] [Indexed: 11/17/2022] Open
Abstract
Intracytoplasmic sperm injection (ICSI) is an effective reproductive technique for obtaining rat offspring using preserved sperm with low or no motility. However, rat oocytes undergo spontaneous activation immediately after retrieval from the oviduct and poorly develop after ICSI unless it is performed quickly. Here, we evaluated whether treatment with MG132, the proteasome inhibitor, suppresses the spontaneous activation of oocytes before and during ICSI. After retrieval from the oviducts, the rate of development into morula and blastocyst from the oocytes cultured in vitro for 1 h prior to ICSI significantly decreased compared with that from the control oocytes subject to ICSI without culture (7% versus 36%). However, a higher proportion of oocytes treated with MG132 for 0, 1, and 3 h before and during ICSI developed into morulae and blastocysts (70%, 60%, and 52%, respectively). Offspring were obtained from oocytes treated with MG132 for 0 and 1 h before and during ICSI (percentage: 31%). Altogether, MG132 could suppress the spontaneous activation of rat oocytes and increase embryonic development after ICSI.
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Affiliation(s)
- Yuki Nakagawa
- Department of Chemistry and Biological Sciences, Faculty of Science and Engineering, Iwate University, Morioka, Iwate, 020-8551, Japan
| | - Takehito Kaneko
- Department of Chemistry and Biological Sciences, Faculty of Science and Engineering, Iwate University, Morioka, Iwate, 020-8551, Japan.
- Division of Fundamental and Applied Sciences, Graduate School of Science and Engineering, Iwate University, Morioka, Iwate, 020-8551, Japan.
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7
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Chen LN, Fan XY, Liu YT, Chen SQ, Xie FY, Zeng L, Wen J, Li J, Ma JY, Ou XH, Luo SM, Guo L. High-Survival Rate After Microinjection of Mouse Oocytes and Early Embryos With mRNA by Combining a Tip Pipette and Piezoelectric-Assisted Micromanipulator. Front Cell Dev Biol 2021; 9:735971. [PMID: 34540848 PMCID: PMC8446388 DOI: 10.3389/fcell.2021.735971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 08/09/2021] [Indexed: 11/21/2022] Open
Abstract
Utilizing microinjection to introduce biological molecules such as DNA, mRNA, siRNA, and proteins into the cell is well established to study oocyte maturation and early embryo development in vitro. However, microinjection is an empirical technology. The cellular survival after microinjection is mainly dependent on the operator, and an experienced operator should be trained for a long time, from several months to years. Optimizing the microinjection to be highly efficient and quickly learned should be helpful for new operators and some newly established laboratories. Here, we combined the tip pipette and piezo-assisted micromanipulator to microinject the oocyte and early embryos at different stages of mouse. The results showed that the survival rate after microinjection was more than 85% for cumulus-oocyte complex, germinal vesicle oocyte, two-cell, and four-cell embryos, and close to 100% for MII oocyte and zygotes. The high-rate survival of microinjection can save many experimental samples. Thus, it should be helpful in studying some rare animal models such as aging and conditional gene knockout mice. Furthermore, our protocol is much easier to learn for new operators, who can usually master the method proficiently after several training times. Therefore, we would like to publicly share this experience, which will help some novices master microinjection skillfully and save many laboratory animals.
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Affiliation(s)
- Lei-Ning Chen
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Xiao-Yan Fan
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Yi-Tong Liu
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Shao-Qing Chen
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Feng-Yun Xie
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Li Zeng
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Juan Wen
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Jin Li
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Jun-Yu Ma
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Xiang-Hong Ou
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Shi-Ming Luo
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Lei Guo
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guangdong-Hong Kong Metabolism and Reproduction Joint Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China
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8
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Matsumura T, Sato T, Abe T, Sanjo H, Katagiri K, Kimura H, Fujii T, Tanaka H, Hirabayashi M, Ogawa T. Rat in vitro spermatogenesis promoted by chemical supplementations and oxygen-tension control. Sci Rep 2021; 11:3458. [PMID: 33568686 PMCID: PMC7875995 DOI: 10.1038/s41598-021-82792-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 01/21/2021] [Indexed: 02/06/2023] Open
Abstract
In vitro spermatogenesis (IVS) using air-liquid interphase organ culture method is possible with mouse testis tissues. The same method, however, has been hardly applicable to animals other than mice, only producing no or limited progression of spermatogenesis. In the present study, we challenged IVS of rats with modifications of culture medium, by supplementing chemical substances, including hormones, antioxidants, and lysophospholipids. In addition, reducing oxygen tension by placing tissues in an incubator of lower oxygen concentration and/or applying silicone cover ceiling on top of the tissue were effective for improving the spermatogenic efficiency. Through these modifications of the culture condition, rat spermatogenesis up to round spermatids was maintained over 70 days in the cultured tissue. Present results demonstrated a significant progress in rat IVS, revealing conditions commonly favorable for mice and rats as well as finding rat-specific optimizations. This is an important step towards successful IVS in many animal species, including humans.
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Affiliation(s)
- Takafumi Matsumura
- grid.268441.d0000 0001 1033 6139Laboratory of Biopharmaceutical and Regenerative Sciences, Institute of Molecular Medicine and Life Science, Yokohama City University Association of Medical Science, Yokohama, Kanagawa Japan
| | - Takuya Sato
- grid.268441.d0000 0001 1033 6139Laboratory of Biopharmaceutical and Regenerative Sciences, Institute of Molecular Medicine and Life Science, Yokohama City University Association of Medical Science, Yokohama, Kanagawa Japan
| | - Takeru Abe
- grid.268441.d0000 0001 1033 6139Laboratory of Biopharmaceutical and Regenerative Sciences, Institute of Molecular Medicine and Life Science, Yokohama City University Association of Medical Science, Yokohama, Kanagawa Japan
| | - Hiroyuki Sanjo
- grid.268441.d0000 0001 1033 6139Department of Urology, Yokohama City University School of Medicine, Yokohama, Kanagawa Japan
| | - Kumiko Katagiri
- grid.268441.d0000 0001 1033 6139Laboratory of Biopharmaceutical and Regenerative Sciences, Institute of Molecular Medicine and Life Science, Yokohama City University Association of Medical Science, Yokohama, Kanagawa Japan
| | - Hiroshi Kimura
- grid.265061.60000 0001 1516 6626Department of Mechanical Engineering, Tokai University, Hiratsuka, Kanagawa Japan
| | - Teruo Fujii
- grid.26999.3d0000 0001 2151 536XInstitute of Industrial Science, University of Tokyo, Bunkyo, Tokyo Japan
| | - Hiromitsu Tanaka
- grid.411871.a0000 0004 0647 5488Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo, Nagasaki Japan
| | - Masumi Hirabayashi
- grid.467811.d0000 0001 2272 1771Center for Genetic Analysis of Behavior, National Institute for Physiological Sciences, Okazaki, Aichi Japan
| | - Takehiko Ogawa
- grid.268441.d0000 0001 1033 6139Laboratory of Biopharmaceutical and Regenerative Sciences, Institute of Molecular Medicine and Life Science, Yokohama City University Association of Medical Science, Yokohama, Kanagawa Japan ,grid.268441.d0000 0001 1033 6139Department of Urology, Yokohama City University School of Medicine, Yokohama, Kanagawa Japan
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Abstract
New genome-editing tools, such as ZFNs, TALEN, and CRISPR/Cas9, have enabled the generation of gene-modified models effectively in mammals. These technologies are a powerful tool for studying gene function and creating animal models for human diseases. On the other hand, such gene-modified animals are raised in numerous experimental animal facilities, which puts pressure on breeding space and maintenance costs. Embryo and sperm cryopreservation is not only the most simple and cost-effective method available for most gene-modified strains but also the most reliable method to preserve strains to avoid breeding problems and contamination. We have established a reliable, high quality embryo and sperm cryopreservation system for rat strains, ensuring the longevity of these valuable resources for the scientific community. These cryopreserved resources have been successfully used to rederive next generation pups using embryo transfer and intracytoplasmic sperm injection (ICSI). In this chapter, we describe in detail protocols for rat embryo vitrification and sperm cryopreservation followed by pup rederivation using the ICSI procedure and embryo transfer.
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10
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Rapid and efficient production of genome-edited animals by electroporation into oocytes injected with frozen or freeze-dried sperm. Cryobiology 2019; 90:71-74. [DOI: 10.1016/j.cryobiol.2019.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/20/2019] [Accepted: 08/20/2019] [Indexed: 11/22/2022]
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11
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Kaneko T. Reproductive technologies for the generation and maintenance of valuable animal strains. J Reprod Dev 2018; 64:209-215. [PMID: 29657233 PMCID: PMC6021608 DOI: 10.1262/jrd.2018-035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Many types of mutant and genetically engineered strains have been produced in various animal species. Their numbers have dramatically increased in recent years, with new strains being
rapidly produced using genome editing techniques. In the rat, it has been difficult to produce knockout and knock-in strains because the establishment of stem cells has been insufficient.
However, a large number of knockout and knock-in strains can currently be produced using genome editing techniques, including zinc-finger nuclease (ZFN), transcription activator-like
effector nuclease (TALEN), and the clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated protein 9 (Cas9) system. Microinjection technique has also
contributed widely to the production of various kinds of genome edited animal strains. A novel electroporation method, the “Technique for Animal Knockout system by Electroporation (TAKE)”
method, is a simple and highly efficient tool that has accelerated the production of new strains. Gamete preservation is extremely useful for maintaining large numbers of these valuable
strains as genetic resources in the long term. These reproductive technologies, including microinjection, TAKE method, and gamete preservation, strongly support biomedical research and the
bio-resource banking of animal models. In this review, we introduce the latest reproductive technologies used for the production of genetically engineered animals, especially rats, using
genome editing techniques and the efficient maintenance of valuable strains as genetic resources. These technologies can also be applied to other laboratory animals, including mice, and
domestic and wild animal species.
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Affiliation(s)
- Takehito Kaneko
- Division of Science and Engineering, Graduate School of Arts and Science, Iwate University, Iwate 020-8551, Japan.,Department of Chemistry and Biological Sciences, Faculty of Science and Engineering, Iwate University, Iwate 020-8551, Japan.,Soft-Path Science and Engineering Research Center (SPERC), Iwate University, Iwate 020-8551, Japan
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12
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Liu X, Baloch Z, Wang G, Xue S, Huang Q, Yang S. High efficient and non-invasive collection of ejaculates from rats using penile vibratory stimulation. Theriogenology 2018; 106:192-197. [PMID: 29080477 DOI: 10.1016/j.theriogenology.2017.10.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 10/15/2017] [Accepted: 10/16/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND The rat is one of the most important experimental animals, which plays an indispensable role in biomedical research, particularly in reproduction. However, according to our best knowledge, there is no easy and efficient method available for semen collection from rats. RESULTS In this study, we successfully collected semen through penile vibratory stimulation ejaculation (PVSE) from laboratory rats. This is an easier and more efficient method compared with rectal probe electro-ejaculation (RPE). We found that the ejaculation rate, volume, concentration and motility of semen collected with PVSE were substantially better than those of RPE. Although PVSE was time-consuming compared to RPE, the quality of semen was better; additionally, sperm concentration and motility of semen were significantly higher with a two-day interval between collections compared to a five-day interval. Moreover, we found that electrical stimulation, use of anesthesia and increased age of rats have a negative effect on sperm quality. In the last experiment, four fertile female rats were artificially inseminated with PVSE-collected semen, and healthy offspring were born. CONCLUSION Here, for the first time, we established the repeated collection of semen using the PVSE method in rats.
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Affiliation(s)
- Xiaoxing Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, South China Agricultural University, Guangzhou 510642, PR China
| | - Zulqarain Baloch
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, South China Agricultural University, Guangzhou 510642, PR China
| | - Ge Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, South China Agricultural University, Guangzhou 510642, PR China
| | - Senren Xue
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, South China Agricultural University, Guangzhou 510642, PR China
| | - Qunshang Huang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, South China Agricultural University, Guangzhou 510642, PR China
| | - Shihua Yang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, South China Agricultural University, Guangzhou 510642, PR China.
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13
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Nakamura K, Morimoto K, Shima K, Yoshimura Y, Kazuki Y, Suzuki O, Matsuda J, Ohbayashi T. The effect of supplementation of amino acids and taurine to modified KSOM culture medium on rat embryo development. Theriogenology 2016; 86:2083-90. [DOI: 10.1016/j.theriogenology.2016.07.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 06/28/2016] [Accepted: 07/02/2016] [Indexed: 10/21/2022]
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14
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Taketsuru H, Kaneko T. In vitro maturation of immature rat oocytes under simple culture conditions and subsequent developmental ability. J Reprod Dev 2016; 62:521-526. [PMID: 27375268 PMCID: PMC5081740 DOI: 10.1262/jrd.2016-057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Rat oocytes can be produced artificially by superovulation. Because some strains show low sensitivity to superovulation treatment, in vitro maturation is an alternative method to produce numerous matured oocytes. Furthermore, establishment of an in vitro maturation system with simple culture conditions is cost effective and leads to easy handling of oocytes. This study examined developmental ability of rat germinal vesicle (GV) oocytes maturing in vitro under simple culture conditions. Significantly different numbers of ovulated oocytes reached the second metaphase of meiosis (MII) among Jcl:Wistar (17.0), F344/Stm (31.0), and BN/SsNSlc (2.2) rats in whom superovulation was induced by pregnant mare serum gonadotropin (PMSG) and human chorionic gonadotropin. However, similar numbers of GV oocytes were obtained from ovaries of PMSG-injected Wistar (27.7), F344 (34.7), and BN (24.7) rats. These GV oocytes were cultured in vitro in HTF, αMEM, and a 1:1 HTF + αMEM or TYH + αMEM mixture. High proportions of Wistar and F344 oocytes that matured to MII in αMEM were parthenogenetically activated by strontium chloride treatment (78% and 74%, respectively). Additionally, 10% of matured oocytes of both strains developed into offspring after intracytoplasmic sperm injection and embryo transfer to foster mothers. Although BN oocytes cultured in αMEM could be parthenogenetically activated and developed into offspring, the success rate was lower than that for Wistar and F344 oocytes. This study demonstrated that numerous GV oocytes were produced in rat ovaries by PMSG injection. This simple in vitro maturation system of immature oocytes could be further developed to maintain valuable rat strains experiencing reproductive difficulties.
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Affiliation(s)
- Hiroaki Taketsuru
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
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15
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Hochi S. Microtubule assembly crucial to bovine embryonic development in assisted reproductive technologies. Anim Sci J 2016; 87:1076-83. [PMID: 27169525 PMCID: PMC5084824 DOI: 10.1111/asj.12621] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 01/05/2016] [Accepted: 01/25/2016] [Indexed: 11/30/2022]
Abstract
Centrosome integrity and microtubule network are crucial to the events around fertilization, including pronuclear development, migration and fusion, and the first mitotic division. The present review highlights the importance of bull spermatozoal centrosomes to function as a microtubule‐organizing center for successful fertilization and the subsequent embryonic development. Spermatozoal centrosomes need to be blended with ooplasmic pericentriolar materials accurately to nucleate and organize the sperm aster. Dysfunction of the spermatozoal centrosomes is associated with fertilization failure, which has been overcome with supplemental stimuli for oocyte activation following intracytoplasmic sperm injection in humans. Even though the spermatozoal centrosomes are functionally intact, abnormal sperm aster formation was frequently observed in vitrified‐warmed bovine oocytes, with delayed pronuclear development and migration. Treatment of the post‐warm oocytes with Rho‐associated coiled‐coil kinase inhibitor or α‐tocopherol inhibited the incidence of the abnormal aster formation, resulting in higher blastocyst yields following in vitro fertilization and culture. Thus, understanding of centrosomal function made it possible to improve the performance of advanced reproductive technologies.
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Affiliation(s)
- Shinichi Hochi
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
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16
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Hayama T, Yamaguchi T, Kato‐Itoh M, Ishii Y, Mizuno N, Umino A, Sato H, Sanbo M, Hamanaka S, Masaki H, Hirabayashi M, Nakauchi H. Practical selection methods for rat and mouse round spermatids without DNA staining by flow cytometric cell sorting. Mol Reprod Dev 2016; 83:488-96. [DOI: 10.1002/mrd.22644] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 03/17/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Tomonari Hayama
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Tomoyuki Yamaguchi
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Megumi Kato‐Itoh
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Yumiko Ishii
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Naoaki Mizuno
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Ayumi Umino
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Hideyuki Sato
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Makoto Sanbo
- Center for Genetic Analysis of BehaviorNational Institute for Physiological SciencesOkazakiAichiJapan
| | - Sanae Hamanaka
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Hideki Masaki
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
| | - Masumi Hirabayashi
- Center for Genetic Analysis of BehaviorNational Institute for Physiological SciencesOkazakiAichiJapan
| | - Hiromitsu Nakauchi
- Division of Stem Cell TherapyCenter for Stem Cell Biology and Regenerative MedicineInstitute of Medical ScienceUniversity of TokyoMinato‐kuTokyoJapan
- Institute for Stem Cell Biology and Regenerative MedicineStanford University School of MedicineStanfordCalifornia
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17
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Kaneko T. Sperm freeze-drying and micro-insemination for biobanking and maintenance of genetic diversity in mammals. Reprod Fertil Dev 2016; 28:RD15386. [PMID: 26922373 DOI: 10.1071/rd15386] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 12/12/2015] [Indexed: 02/28/2024] Open
Abstract
Breeding by natural mating is ideal for maintaining animal populations. However, the lack of breeding space resulting from an increased number of strains and the decline in fertility caused by inbreeding inhibits the reproduction of subsequent generations. Reproductive technologies, such as gamete preservation and artificial fertilisation, have been developed to overcome these problems. These approaches efficiently produce offspring of laboratory, domestic and wild animals, and can also be used to treat human infertility. Gamete preservation using sperm contributes to improvements in reproductive systems and enables the use of smaller breeding spaces. Although cryopreservation with liquid nitrogen has been used to preserve spermatozoa, freeze-drying without liquid nitrogen, a novel method, facilitates long-term storage of spermatozoa. This method has recently been applied to maintain animal strains. Micro-insemination techniques, such as intracytoplasmic sperm injection (ICSI), are exceptional for improving assisted reproduction. ICSI can be used to fertilise oocytes, even with immotile and immature spermatozoa that are unsuitable for AI and IVF. Reproductive technologies provide a substantial advantage for biobanking and maintaining the genetic diversity of laboratory, domestic and wild animals. This review covers the latest method of sperm freeze-drying and micro-insemination, and future possibilities for maintaining animal strains and populations.
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18
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Abstract
Freeze-drying spermatozoa is the ultimate method for the maintenance of animal strains, in that the gametes can be preserved for a long time in a refrigerator at 4 °C. Furthermore, it is possible to realize easy and safe transportation of spermatozoa at an ambient temperature that requires neither liquid nitrogen nor dry ice. Freeze-drying spermatozoa has been established as a new method for storing genetic resources instead of cryopreservation using liquid nitrogen. This chapter introduces our latest protocols for freeze-drying of mouse and rat spermatozoa, and the anticipated results of the fertilizing ability of these gametes following long-term preservation or transportation.
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Affiliation(s)
- Takehito Kaneko
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan,
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19
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Kaneko T. Simple gamete preservation and artificial reproduction of mammals using micro-insemination techniques. Reprod Med Biol 2014; 14:99-105. [PMID: 29259407 DOI: 10.1007/s12522-014-0202-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/09/2014] [Indexed: 11/24/2022] Open
Abstract
Assisted reproductive technology (ART) has been applied in various procedures as an effective breeding method in experimental, domestic, and wild animals, and for the treatment of human infertility. Micro-insemination techniques such as intracytoplasmic injection of spermatozoa and spermatids are now routinely used ART tools. With these techniques, even immotile and immature sperm cells can be employed as donors for producing the next generation. Gamete preservation, another ART tool, has contributed to reproductive regulation, worldwide transportation, and disease protection of animal strains, and the preserved gametes have been effectively used for the production of offspring. ART is now an indispensable tool in mammalian reproduction. This review covers the latest ART tools, with a particular emphasis on micro-insemination and gamete preservation, and discusses the future direction of mammalian artificial reproductive technology.
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Affiliation(s)
- Takehito Kaneko
- Institute of Laboratory Animals, Graduate School of Medicine Kyoto University Yoshida-Konoe-cho, Sakyo-ku 606-8501 Kyoto Japan
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20
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Tsukiyama T, Kato-Itoh M, Nakauchi H, Ohinata Y. A comprehensive system for generation and evaluation of induced pluripotent stem cells using piggyBac transposition. PLoS One 2014; 9:e92973. [PMID: 24667806 PMCID: PMC3965495 DOI: 10.1371/journal.pone.0092973] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Accepted: 02/27/2014] [Indexed: 12/22/2022] Open
Abstract
The most stringent criterion for evaluating pluripotency is generation of chimeric animals with germline transmission ability. Because the quality of induced pluripotent stem cell (iPSC) lines is heterogeneous, an easy and accurate system to evaluate these abilities would be useful. In this study, we describe a simple but comprehensive system for generating and evaluating iPSCs by single transfection of multiple piggyBac (PB) plasmid vectors encoding Tet-inducible polycistronic reprogramming factors, a pluripotent-cell–specific reporter, a constitutively active reporter, and a sperm-specific reporter. Using this system, we reprogrammed 129 and NOD mouse embryonic fibroblasts into iPSCs, and then evaluated the molecular and functional properties of the resultant iPSCs by quantitative RT-PCR analysis and chimera formation assays. The iPSCs contributed extensively to chimeras, as indicated by the constitutively active TagRFP reporter, and also differentiated into sperm, as indicated by the late-spermatogenesis–specific Acr (acrosin)-EGFP reporter. Next, we established secondary MEFs from E13.5 chimeric embryos and efficiently generated secondary iPSCs by simple addition of doxycycline. Finally, we applied this system to establishment and evaluation of rat iPSCs and production of rat sperm in mouse–rat interspecific chimeras. By monitoring the fluorescence of Acr-EGFP reporter, we could easily detect seminiferous tubules containing rat iPSC–derived spermatids and sperm. And, we succeeded to obtain viable offspring by intracytoplasmic sperm injection (ICSI) using these haploid male germ cells. We propose that this system will enable robust strategies for induction and evaluation of iPSCs, not only in rodents but also in other mammals. Such strategies will be especially valuable in non-rodent species, in which verification of germline transmission by mating is inefficient and time-consuming.
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Affiliation(s)
- Tomoyuki Tsukiyama
- PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, Saitama, Japan
- Laboratory for Pluripotent Stem Cell Studies, RIKEN Center for Developmental Biology (CDB), Kobe, Hyogo, Japan
| | - Megumi Kato-Itoh
- PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, Saitama, Japan
- JST, ERATO, Nakauchi Stem Cell and Organ Regeneration Project, Chiyoda-ku, Tokyo, Japan
| | - Hiromitsu Nakauchi
- Division of Stem Cell Therapy, Center for Stem Cell Biology and Regenerative Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
- JST, ERATO, Nakauchi Stem Cell and Organ Regeneration Project, Chiyoda-ku, Tokyo, Japan
| | - Yasuhide Ohinata
- PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, Saitama, Japan
- Laboratory for Pluripotent Stem Cell Studies, RIKEN Center for Developmental Biology (CDB), Kobe, Hyogo, Japan
- Life Science Experimental Facility, Department of Biotechnology, Faculty of Life and Environmental Science, University of Yamanashi, Kofu, Yamanashi, Japan
- * E-mail:
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21
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Develop to term rat oocytes injected with heat-dried sperm heads. PLoS One 2013; 8:e78260. [PMID: 24223784 PMCID: PMC3817241 DOI: 10.1371/journal.pone.0078260] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 09/09/2013] [Indexed: 12/02/2022] Open
Abstract
This study investigated the development of rat oocytes in vitro and in vivo following intracytoplasmic injection of heads from spermatozoa heat-dried at 50°C for 8 h and stored at 4°C in different gas phases. Sperm membrane and chromosome are damaged by the process of heat-drying. Oocyte activation and cleavage of oocytes were worse in oocytes injected with spermatozoa heat-dried and stored for 1 week than unheated, fresh spermatozoa, but in heat-dried spermatozoa, there were no differences in these abilities of oocytes between the samples stored in nitrogen gas and in air. The oocytes injected with heat-dried spermatozoa stored for 1 week could develop to the morula and blastocyst stages without difference between the samples stored in nitrogen gas and in air after artificial stimulation. Cleavage of oocytes and development of cleaved embryos were higher when heat-dried spermatozoa were stored for 3 and 6 months in nitrogen gas than in air. However, the ability of injected oocytes to develop to the morula and blastocyst stages was not inhibited even when heat-dried spermatozoa stored in both atmosphere conditions for as long as 6 months were used. When 2-cell embryos derived from oocytes injected with heads from spermatozoa heat-dried and stored for 1 week and 1 month were transferred, each 1 of 4 recipients was conceived, and the conceived recipients delivered 1 live young each. These results demonstrate that rat oocytes can be fertilized with heat-dried spermatozoa and that the fertilized oocytes can develop to term.
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22
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Varisli O, Scott H, Agca C, Agca Y. The effects of cooling rates and type of freezing extenders on cryosurvival of rat sperm. Cryobiology 2013; 67:109-16. [PMID: 23727068 PMCID: PMC3772956 DOI: 10.1016/j.cryobiol.2013.05.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/11/2013] [Accepted: 05/13/2013] [Indexed: 11/17/2022]
Abstract
Cryopreservation of rat sperm is very challenging due to its sensitivity to various stress factors. The objective of this study was to determine the optimal cooling rate and extender for epididymal sperm of outbred Sprague Dawley (SD) and inbred Fischer 344 (F344) rat strains. The epididymal sperm from 10 to 12 weeks old sexually mature SD and F344 strains were suspended in five different freezing extenders, namely HEPES buffered Tyrode's lactate (TL-HEPES), modified Kreb's Ringer bicarbonate (mKRB), 3% dehydrated skim milk (SM), Salamon's Tris-citrate (TRIS), and tes/tris (TES). All extenders contained 20% egg yolk, 0.75% Equex Paste and 0.1 M raffinose or 0.1 M sucrose. The sperm samples in each extender were cooled to 4°C and held for 45 min for equilibration before freezing. The equilibrated sperm samples in each extender were placed onto a shallow quartz dish inserted into Linkam Cryostage (BCS 196). The samples were then cooled to a final temperature of -150°C by using various cooling rates (10, 40, 70, and 100°C/min). For thawing, the quartz dish containing the sperm samples were rapidly removed from the Linkam cryo-stage and placed on a 37°C slide warmer and held for 1 min before motility analysis. Sperm membrane and acrosomal integrity and mitochondrial membrane potential (MMP) were assessed by SYBR-14/Propidium iodide, Alexa Fluor-488-PNA conjugate and JC-1, respectively. The total motility, acrosomal integrity, membrane integrity and MMP values were compared among cooling rates and extenders. Both cooling rate and type of extender had significant effect on cryosurvival (P < 0.05). Sperm motility increased as cooling rate was increased for both strains (P < 0.05). Highest cryosurvival was achieved when 100°C/min cooling rate was used in combination with TES extender containing 20% egg yolk, 0.75% Equex paste and either 0.1M sucrose or raffinose (P < 0.05). This study showed that TES extender containing 0.1 M raffinose or sucrose with 70°C/min and 100°C/min cooling rate improved post-thaw motility of rat sperm.
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Affiliation(s)
- Omer Varisli
- University of Harran, Faculty of Veterinary Medicine, Department of Reproduction, and Artificial Insemination, Eyyubiye Campus, Sanliurfa, 63300 Turkey
| | - Hollie Scott
- University of Missouri, College of Veterinary Medicine, Dept. of Veterinary Pathobiology, 1600 East Rollins Street, Columbia, MO 65211
| | - Cansu Agca
- University of Missouri, College of Veterinary Medicine, Dept. of Veterinary Pathobiology, 1600 East Rollins Street, Columbia, MO 65211
| | - Yuksel Agca
- University of Missouri, College of Veterinary Medicine, Dept. of Veterinary Pathobiology, 1600 East Rollins Street, Columbia, MO 65211
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Nakata M, Okuda Y, Yamashita Y, Nakauchi C, Ito J, Kashiwazaki N. Successful production of offspring using cryopreserved sperm via nonsurgical artificial insemination in rats. J Reprod Dev 2012; 58:501-4. [PMID: 22452831 DOI: 10.1262/jrd.2012-014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In rats, artificial insemination (AI) is surgically performed as a general tool to obtain offspring using cryopreserved spermatozoa. Nonsurgical AI is a more desirable technology because it does not require any surgical procedures. However, there has never been a successful nonsurgical AI since frozen-thawed rat spermatozoa show low motility. We show here for the first time successful nonsurgical AI in rats using oxytocin treatment. Intraperitoneal injection of oxytocin (1/800 IU) immediately before nonsurgical AI significantly increased the number of sperm collected from the oviducts compared with that without oxytocin treatment. Therefore, to obtain pups, oxytocin was intraperitoneally injected into females mated with vasectomized males, and the rats were then used for nonsurgical AI. Seven of the 12 oxytocin-treated rats became pregnant after nonsurgical AI, and 37 pups were obtained. Only one rat (1/13) without oxytocin treatment was pregnant after nonsurgical AI, and only 1 pup was delivered. These results show success for the first time in obtaining offspring using frozen-thawed rat spermatozoa via nonsurgical AI. Our results also suggest the possibility that oxytocin treatment is effective for improvement of nonsurgical AI even in other species.
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Affiliation(s)
- Makoto Nakata
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara 252-5201, Japan
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Nakai M, Ito J, Sato KI, Noguchi J, Kaneko H, Kashiwazaki N, Kikuchi K. Pre-treatment of sperm reduces success of ICSI in the pig. Reproduction 2011; 142:285-93. [PMID: 21610169 DOI: 10.1530/rep-11-0073] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In pigs, although ICSI is a feasible fertilization technique, its efficiency is low. In general, injected pig sperm are insufficient to induce oocyte activation and embryonic development. Pretreatments for disrupting sperm membranes have been applied to improve the fertility of ICSI oocytes; however, we hypothesize that such pretreatment(s) may reduce the ability of the sperm to induce oocyte activation. We first evaluated the effects of sperm pretreatments (sonication (SO) to isolate the sperm heads from the tails, Triton X-100 (TX), and three cycles of repeated freezing/thawing (3×-FT) for disrupting sperm membranes) on the rate of pronucleus (PN) formation after ICSI. We found that oocytes injected with control (whole) sperm had higher rates of PN formation than those obtained after subjecting the sperm to SO, TX, and 3×-FT. The amounts of phospholipase Cζ (PLCζ), which is thought to be the oocyte-activating factor in mammalian sperm, in sperm treated by each method was significantly lower than that in whole untreated sperm. Furthermore, using immunofluorescence, it was found that in pig sperm, PLCζ was localized to both the post-acrosomal region and the tail area. Thus we demonstrated for the first time that sperm pretreatment leads to a reduction of oocyte-activating capacity. Our data also show that in addition to its expected localization to the sperm head, PLCζ is also localized in the tail of pig sperm, thus raising the possibility that injection of whole sperm may be required to attain successful activation in pigs.
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Affiliation(s)
- Michiko Nakai
- Reproductive Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan.
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Abstract
The objective of this study was to test if intracytoplasmic sperm injection (ICSI)-mediated gene transfer was an effective method in the production of transgenic rabbit embryos. Rabbit sperm diluted in different media with various pH were treated by freezing without cryoprotectant, and their ability for DNA uptake was determined. In these experiments using production of transgenic rabbit embryos by ICSI, exogenous genes at three concentrations and of two conformation types were used. The rate of DNA association to the sperm seen by rhodamine-tagged DNA encoding green fluorescent protein (GFP) was 90.0%, 92.7%, 91.0%, 91.7%, and 92.3%, respectively in TCM199, DM, DPBS, CZB, and HCZB media. The DNA attachment to sperm was not affected by media pH within the range of 5.4-9.4 (p > 0.05). Expression of GFP first occurred at the 2-cell stage and continued to blastocyst formation. DNA concentration (between 5, 10, and 20 ng/μl) or conformation (linear and circular) had no effect on the production rate of transgenic embryos. These results indicated that genetically modified rabbit blastocysts can be efficiently produced by ICSI technique.
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Mashimo T, Ohmori I, Ouchida M, Ohno Y, Tsurumi T, Miki T, Wakamori M, Ishihara S, Yoshida T, Takizawa A, Kato M, Hirabayashi M, Sasa M, Mori Y, Serikawa T. A missense mutation of the gene encoding voltage-dependent sodium channel (Nav1.1) confers susceptibility to febrile seizures in rats. J Neurosci 2010; 30:5744-53. [PMID: 20410126 PMCID: PMC6632336 DOI: 10.1523/jneurosci.3360-09.2010] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Revised: 03/02/2010] [Accepted: 03/10/2010] [Indexed: 11/21/2022] Open
Abstract
Although febrile seizures (FSs) are the most common convulsive syndrome in infants and childhood, the etiology of FSs has remained unclarified. Several missense mutations of the Na(v)1.1 channel (SCN1A), which alter channel properties, have been reported in a familial syndrome of GEFS+ (generalized epilepsy with febrile seizures plus). Here, we generated Scn1a-targeted rats carrying a missense mutation (N1417H) in the third pore region of the sodium channel by gene-driven ENU (N-ethyl-N-nitrosourea) mutagenesis. Despite their normal appearance under ordinary circumstances, Scn1a mutant rats exhibited remarkably high susceptibility to hyperthermia-induced seizures, which involve generalized clonic and/or tonic-clonic convulsions with paroxysmal epileptiform discharges. Whole-cell patch-clamp recordings from HEK cells expressing N1417H mutant channels and from hippocampal GABAergic interneurons of N1417H mutant rats revealed a significant shift of the inactivation curve in the hyperpolarizing direction. In addition, clamp recordings clearly showed the reduction in action potential amplitude in the hippocampal interneurons of these rats. These findings suggest that a missense mutation (N1417H) of the Na(v)1.1 channel confers susceptibility to FS and the impaired biophysical properties of inhibitory GABAergic neurons underlie one of the mechanisms of FS.
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Affiliation(s)
- Tomoji Mashimo
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan.
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Abstract
Intracytoplasmic sperm injection (ICSI) has been successfully achieved in mice and rats using a piezo-driven injection pipette, with the offspring rate of >30%. The ICSI technique was applied not only to rescue infertile male strains but also to produce transgenic rodents. The ICSI-mediated DNA transfer, that the sperm heads and exogenous DNA solution are mixed and co-injected into ooplasm, has been equally effective to the conventional pronuclear DNA microinjection. Production efficiency of transgenic founders by the ICSI-mediated DNA transfer was comparable between mice and rats, while the optimal DNA concentration was lower in rats than mice. The production efficiency was improved when membrane structure of sperm heads was partially disrupted by detergent or ultrasonic treatment before exposure to the exogenous DNA solution. Exogenous DNAs with various chain lengths were stably integrated into the rodent genomes of various genetic backgrounds by this method. The ICSI-mediated DNA transfer in which the preparation of pronuclear-stage fertilized zygotes is not required would be alternative to conventional pronuclear DNA microinjection.
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Yoshizawa Y, Kato M, Hirabayashi M, Hochi S. Impaired active demethylation of the paternal genome in pronuclear-stage rat zygotes produced by in vitro fertilization or intracytoplasmic sperm injection. Mol Reprod Dev 2009; 77:69-75. [DOI: 10.1002/mrd.21109] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Hirabayashi M, Kato M, Kitada K, Ohnami N, Hirao M, Hochi S. Activation regimens for full-term development of rabbit oocytes injected with round spermatids. Mol Reprod Dev 2009; 76:573-9. [PMID: 19062169 DOI: 10.1002/mrd.20984] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The present study was designed to investigate the effect of activation regimens on full-term development of rabbit oocytes after round spermatid injection (ROSI). In the first series, rabbit oocytes were treated with 5 microM ionomycin before ROSI, after ROSI, or before and after ROSI. In addition, non-treated oocytes were subjected to intracytoplasmic sperm injection (ICSI) using ejaculated spermatozoa. Cleavage rate of ROSI oocytes activated before and after ROSI (55%) was comparable with that of ICSI oocytes (60%), and significantly higher than those of ROSI oocytes activated either before or after ROSI (29-39%; P < 0.05). No offspring were produced by transfer of the cleaving ROSI oocytes, while 8% of the cleaving ICSI oocytes transferred gave birth to offspring. In the second series, oocytes were exposed to 5, 10, or 20 microM ionomycin, followed by ROSI, 5 microM ionomycin treatment, and incubation with 5 microg/ml cycloheximide (CHX) + 2 mM 6-dimethylaminopurine (DMAP). Significantly higher cleavage rates were derived from oocytes activated with 10 and 20 microM ionomycin before ROSI (91% and 82%, respectively; P < 0.05) compared to those activated with 5 microM ionomycin before ROSI (53%). Live offspring were obtained when the cleaving ROSI oocytes with the initial ionomycin treatment at 5 and 10 microM were transferred (offspring rate 2% and 4%, respectively). These activation regimens, however, were not valid for the ROSI using cryopreserved round spermatids. In conclusion, rabbit ROSI oocytes were capable of developing into full-term when the oocytes were activated with a combined treatment of ionomycin and CHX/DMAP.
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Affiliation(s)
- Masumi Hirabayashi
- Section of Mammalian Transgenesis, Center for Genetic Analysis of Behavior, National Institute for Physiological Sciences, Okazaki, Aichi, Japan.
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Kapawa A, Giannakis D, Tsoukanelis K, Kanakas N, Baltogiannis D, Agapitos E, Loutradis D, Miyagawa I, Sofikitis N. Effects of paternal cigarette smoking on testicular function, sperm fertilizing capacity, embryonic development, and blastocyst capacity for implantation in rats. Andrologia 2009. [DOI: 10.1111/j.1439-0272.2004.tb02978.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Bugos O, Bhide M, Zilka N. Beyond the rat models of human neurodegenerative disorders. Cell Mol Neurobiol 2009; 29:859-69. [PMID: 19263215 DOI: 10.1007/s10571-009-9367-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Accepted: 02/11/2009] [Indexed: 12/30/2022]
Abstract
The rat is a model of choice in biomedical research for over a century. Currently, the rat presents the best "functionally" characterized mammalian model system. Despite this fact, the transgenic rats have lagged behind the transgenic mice as an experimental model of human neurodegenerative disorders. The number of transgenic rat models recapitulating key pathological hallmarks of Alzheimer's disease, Huntington's disease, amyotrophic lateral sclerosis, or human tauopathies is still limited. The reason is that the transgenic rats remain more difficult to produce than transgenic mice. The gene targeting technology is not yet established in rats due to the lack of truly totipotent embryonic stem cells and cloning technology. This extremely powerful technique has given the mouse a clear advantage over the rat in generation of new transgenic models. Despite these limitations, transgenic rats have greatly expanded the range of potential experimental approaches. The large size of rats permits intrathecal administration of drugs, stem cell transplantation, serial sampling of the cerebrospinal fluid, microsurgical techniques, in vivo nerve recordings, and neuroimaging procedures. Moreover, the rat is routinely employed to demonstrate therapeutic efficacy and to assess toxicity of novel therapeutic compounds in drug development. Here we suggest that the rat constitutes a slightly underestimated but perspective animal model well-suited for understanding the mechanisms and pathways underlying the human neurodegenerative disorders.
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Affiliation(s)
- Ondrej Bugos
- Institute of Neuroimmunology, Slovak Academy of Sciences, AD Centre, 845 10 Bratislava, Slovak Republic
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Importance of primary culture conditions for the development of rat ICSI embryos and long-term preservation of freeze-dried sperm. Cryobiology 2009; 58:293-7. [PMID: 19236858 DOI: 10.1016/j.cryobiol.2009.02.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 02/06/2009] [Accepted: 02/12/2009] [Indexed: 11/23/2022]
Abstract
Rat sperm freeze-dried in a solution containing Tris and ethylenediaminetetraacetic acid (EDTA) (TE buffer) can be preserved at 4 degrees C, and oocytes injected with these sperm developed into offspring though developmental ability was low. We studied the culture conditions to improve the developmental ability of oocytes injected with freeze-dried sperm. After being injected with fresh sperm, the zygotes were cultured in modified Krebs-Ringer bicarbonate (mKRB), modified rat 1-cell embryo culture medium (mR1ECM)/BSA, and mR1ECM with different osmolality, before being cultured in mR1ECM. High proportion of zygotes cultured in mKRB (270mOsm) before being cultured in mR1ECM developed into blastocysts compared to zygotes cultured only with mR1ECM (50% vs. 28%, P<0.05). Culturing in mKRB also led to a high proportion of zygotes developing into blastocysts after the injection of freeze-dried sperm than zygotes cultured only with mR1ECM (32% vs. 15%, P<0.05). Offspring (16%) were obtained when 19 2-cell embryos derived from oocytes that had been injected with freeze-dried sperm preserved at 4 degrees C for 1year were transferred. This study demonstrated that the culture conditions soon after the injection of sperm markedly influenced the subsequent development of embryos. Also, rat sperm after freeze-drying in TE buffer were preserved at 4 degrees C for long term without their deterioration.
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SEITA Y, ITO J, KASHIWAZAKI N. Removal of Acrosomal Membrane from Sperm Head Improves Development of Rat Zygotes Derived from Intracytoplasmic Sperm Injection. J Reprod Dev 2009; 55:475-9. [DOI: 10.1262/jrd.20216] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Yasunari SEITA
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University
| | - Junya ITO
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University
| | - Naomi KASHIWAZAKI
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University
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Kikuchi K, Kashiwazaki N, Nagai T, Nakai M, Somfai T, Noguchi J, Kaneko H. Selected aspects of advanced porcine reproductive technology. Reprod Domest Anim 2008; 43 Suppl 2:401-6. [PMID: 18638153 DOI: 10.1111/j.1439-0531.2008.01191.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
In vitro fertilization (IVF) of in vitro matured (IVM) oocytes in pigs has become the most popular method of studying gametogenesis and embryogenesis in this species. Furthermore, because of recent advances in in vitro culture (IVC) of IVM-IVF embryos, in vitro production (IVP) of embryos now enables us to generate viable embryos as successfully as for in vivo-derived embryos and with less cost and in less time. These technologies contribute not only to developments in reproductive physiology and agriculture but also to the conservation of porcine genetic resources and the production of cloned or genetically modified pigs. However, in IVP, there still remains the problem of abnormal ploidy, which is caused by performing procedures under non-physiological conditions. In recent years, unique technologies such as intracytoplasmic sperm injection (ICSI) or xenografting of gonadal tissue into immunodeficient experimental animals have been developed to help conserve gamete resources. These technologies combined with IVP are expected to be useful for the conservation of gametes from important genetic resources. Here, we discuss the developmental ability and normality of porcine IVP embryos and also the utilization of ICSI and xenografting in advancing biotechnology in pigs.
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Affiliation(s)
- K Kikuchi
- Division of Animal Sciences, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan.
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Effect of glutathione on the development of rat embryos following microinsemination. Reprod Med Biol 2008; 8:11-17. [PMID: 29699302 DOI: 10.1007/s12522-008-0002-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Accepted: 09/22/2008] [Indexed: 10/21/2022] Open
Abstract
Purpose The present study was carried out to evaluate the role of glutathione on rat embryo developmental potential after ICSI. We observed the effects of glutathione on the development of non-treated rat embryos, ICSI embryos and embryos with sham injection treatment. The development of glutathione-microinjected embryos was also observed. Methods Oocytes and fertilized embryos were obtained from superovulated Wistar-Imamichi rats and cultured in mR1ECM medium. Oocytes and embryos were then allowed to develop to assess the effect of glutathione on the development rate in intact embryos, micro-injected embryos and ICSI embryos. Results (1) In the intact embryo, the proportion of blastocyst stage development increased when 0.01 mM GSH was added to the medium compared to the control. (2) Microinjection of glutathione (GSSG, GSH) into the embryo increased development at each stage, and the addition of 0.2 nM GSSG or GSH significantly increased blastocyst development, in comparison to that of the control (P < 0.05). (3) Compared to the control, all the GSSG and GSH concentrations improved damaged blastocyst development, where 0.01 mM GSH improved significantly (P < 0.05). (4) The addition of glutathione in the medium increased the rate of blastocyst development after ICSI. A significantly higher number of TE and total cells were obtained in the micro-injected embryo with both of the 0.02 mM GSSG and GSH treatments (P < 0.05). Conclusions The addition of glutathione into the culture media can improve early embryo development and is capable of repairing the damage of ICSI rat embryos.
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Kanatsu-Shinohara M, Kato M, Takehashi M, Morimoto H, Takashima S, Chuma S, Nakatsuji N, Hirabayashi M, Shinohara T. Production of Transgenic Rats via Lentiviral Transduction and Xenogeneic Transplantation of Spermatogonial Stem Cells1. Biol Reprod 2008; 79:1121-8. [DOI: 10.1095/biolreprod.108.071159] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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Li TS, Takahashi M, Ohshima M, Qin SL, Kubo M, Muramatsu K, Hamano K. Myocardial repair achieved by the intramyocardial implantation of adult cardiomyocytes in combination with bone marrow cells. Cell Transplant 2008; 17:695-703. [PMID: 18819257 DOI: 10.3727/096368908786092702] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Various cytokines produced by bone marrow cells can protect adult cardiomyocytes against apoptosis. Thus, we investigated the feasibility of implanting adult cardiomyocytes in combination with bone marrow cells for myocardial repair. Ventricular cardiomyocytes were isolated from adult rats and cocultured with bone marrow cells. Using a rat model of doxorubicin-induced cardiomyopathy, we injected 6 x 10(5) adult cardiomyocytes, 3 x 10(7) bone marrow cells, or both into damaged hearts, for myocardial repair. Coculture of the cardiomyocytes with the bone marrow cells enhanced the expression of integrin-beta1D and focal adhesion kinase in cardiomyocytes, resulting in increased survival and decreased apoptosis of the cardiomyocytes after 7 days of culture. Compared with the baseline levels, cardiac function was preserved by the implantation of bone marrow cells alone and by the implantation of cardiomyocytes in combination with bone marrow cells, but it was decreased significantly 28 days after the implantation of cardiomyocytes alone. Furthermore, apoptosis of the host cardiomyocytes was decreased significantly after the implantation of bone marrow cells alone, or in combination with cardiomyocytes, compared with that after the implantation of cardiomyocytes alone (p < 0.01). Interestingly, the implantation of adult cardiomyocytes in combination with bone marrow cells resulted in a dramatic increase in the survival of donor cardiomyocytes, and induced the myogenic differentiation of donor bone marrow stem cells. Our findings indicate that cardiomyocytes and bone marrow cells can assist and compliment each other; thus, the implantation of adult cardiomyocytes in combination with bone marrow cells shows promise as a feasible new strategy for myocardial repair.
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Affiliation(s)
- Tao-Sheng Li
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
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Availability of subfertile transgenic rats expressing the c-myc gene as recipients for spermatogonial transplantation. Transgenic Res 2008; 18:135-41. [DOI: 10.1007/s11248-008-9219-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 09/08/2008] [Indexed: 12/19/2022]
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Hochi S, Watanabe K, Kato M, Hirabayashi M. Live rats resulting from injection of oocytes with spermatozoa freeze-dried and stored for one year. Mol Reprod Dev 2008; 75:890-4. [PMID: 17926349 DOI: 10.1002/mrd.20825] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study was designed to examine whether rat spermatozoa after freeze-drying and 1-year storage can participate in full-term development following intracytoplasmic sperm injection (ICSI). Cauda epididymal spermatozoa from Crlj:Wistar rats were frozen in liquid nitrogen (LN(2)), first dried for 14 hr at 0.37 hPa and then for 3 hr at 0.001 hPa. The dried spermatozoa were stored for 1 year in a desiccator at +25 degrees C, or in a refrigerator at +4 degrees C, or in LN(2) at -196 degrees C. Controls consisted of sperm that had only been frozen and stored in LN(2). After being stored, spermatozoa were sonicated to dissociate the sperm tail and were injected into oocytes from superovulated Slc:SD rats. The respective fertilization rates of oocytes injected with frozen sperm, or with freeze-dried sperm stored at +25, +4, and -196 degrees C were 79%, 75%, 70%, and 73%. However, the corresponding cleavage rates of injected oocytes were 63%, 1%, 38%, and 36%. After transfer of >80 zygotes of each group into recipients, the respective percentages of full-term normal offspring resulting from frozen sperm or from freeze-dried sperm stored at +25, +4, and -196 degrees C were 36%, 0%, 7%, and 14%. These results demonstrate that the storage temperature significantly influenced the likelihood of term development of rats produced by injection of oocytes with freeze-dried spermatozoa. Chromosomal analysis of the rat spermatozoa in the ICSI oocytes indicated that chromosomal aberration in freeze-dried spermatozoa stored at +25 degrees C (100%) occurred more frequently than in frozen control spermatozoa (41%) and freeze-dried spermatozoa stored at -196 degrees C (35%), and the frequency of chromosomal aberrations in freeze-dried spermatozoa stored at +4 degrees C (65%) was the intermediate. In conclusion, rat spermatozoa freeze-dried and stored at +4 degrees C for 1 year are capable of participating in full-term development after ICSI.
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Affiliation(s)
- Shinichi Hochi
- Faculty of Textile Science and Technology, Shinshu University, Ueda, Nagano, Japan.
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Aitman TJ, Critser JK, Cuppen E, Dominiczak A, Fernandez-Suarez XM, Flint J, Gauguier D, Geurts AM, Gould M, Harris PC, Holmdahl R, Hubner N, Izsvák Z, Jacob HJ, Kuramoto T, Kwitek AE, Marrone A, Mashimo T, Moreno C, Mullins J, Mullins L, Olsson T, Pravenec M, Riley L, Saar K, Serikawa T, Shull JD, Szpirer C, Twigger SN, Voigt B, Worley K. Progress and prospects in rat genetics: a community view. Nat Genet 2008; 40:516-22. [PMID: 18443588 DOI: 10.1038/ng.147] [Citation(s) in RCA: 234] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The rat is an important system for modeling human disease. Four years ago, the rich 150-year history of rat research was transformed by the sequencing of the rat genome, ushering in an era of exceptional opportunity for identifying genes and pathways underlying disease phenotypes. Genome-wide association studies in human populations have recently provided a direct approach for finding robust genetic associations in common diseases, but identifying the precise genes and their mechanisms of action remains problematic. In the context of significant progress in rat genomic resources over the past decade, we outline achievements in rat gene discovery to date, show how these findings have been translated to human disease, and document an increasing pace of discovery of new disease genes, pathways and mechanisms. Finally, we present a set of principles that justify continuing and strengthening genetic studies in the rat model, and further development of genomic infrastructure for rat research.
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Affiliation(s)
- Timothy J Aitman
- Medical Research Council Clinical Sciences Centre and Imperial College London, Du Cane Road, London W12 0NN, UK.
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Mashimo T, Yanagihara K, Tokuda S, Voigt B, Takizawa A, Nakajima R, Kato M, Hirabayashi M, Kuramoto T, Serikawa T. An ENU-induced mutant archive for gene targeting in rats. Nat Genet 2008; 40:514-5. [PMID: 18443587 DOI: 10.1038/ng0508-514] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Baba T, Iwasaki S, Maruoka T, Suzuki A, Tomaru U, Ikeda H, Yoshiki T, Kasahara M, Ishizu A. Rat CD4+CD8+Macrophages Kill Tumor Cells through an NKG2D- and Granzyme/Perforin-Dependent Mechanism. THE JOURNAL OF IMMUNOLOGY 2008; 180:2999-3006. [DOI: 10.4049/jimmunol.180.5.2999] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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43
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HIRABAYASHI M. Technical Development for Production of Gene-Modified Laboratory Rats. J Reprod Dev 2008; 54:95-9. [DOI: 10.1262/jrd.19174] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Masumi HIRABAYASHI
- National Institute for Physiological Sciences, The Graduate University for Advanced Studies
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Shinmen A, Honda A, Ohkawa M, Hirose M, Ogonuki N, Yuzuriha M, Miki H, Mochida K, Inoue K, Abe K, Ito M, Ogura A. Efficient production of intersubspecific hybrid mice and embryonic stem cells by intracytoplasmic sperm injection. Mol Reprod Dev 2007; 74:1081-8. [PMID: 17290420 DOI: 10.1002/mrd.20612] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Recently, mice and embryonic stem (ES) cells with allelic polymorphisms have been used extensively in the field of genetics and developmental biology. In this study, we examined whether intersubspecific hybrid mice and ES cells with these genotypes can be efficiently produced by intracytoplasmic sperm injection (ICSI). Frozen-thawed spermatozoa from wild-derived strains, JF1 (Mus musculus molossinus), MSM (M. m. molossinus), HMI (M. m. castaneus), and SWN (M. m. spp.), were directly injected into mature oocytes from laboratory mice ([C57BL/6 x DBA2]F1; M. m. domesticus). The in vitro and in vivo developmental capacity of F1 embryos was not significantly different among the groups (P > 0.05), and term offspring were efficiently obtained in all groups (27%-34% of transferred embryos). However, the mean body and placental weights of the offspring differed significantly with genotype (P < 5 x 10(-10)), with the HMI hybrid greatest in both body and placental weights. In an application study using these F1 offspring, we analyzed their mitochondrial DNA using intersubspecific polymorphisms and found the consistent disappearance of sperm mitochondrial DNA in the F1 progeny. In a second series of experiments, we generated F1 blastocysts by injecting MSM spermatozoa into C57BL/6 oocytes and used them to generate hybrid ES cell lines. The ES cell lines were established at a high efficiency (9 lines from 20 blastocysts) and their allelic polymorphisms were confirmed. Thus, ICSI using cryopreserved spermatozoa allows the efficient and immediate production of a number of F1 hybrid mice and ES cell lines, which can be used for polymorphic analysis of mouse genetics.
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Affiliation(s)
- Akie Shinmen
- RIKEN Bioresource Center, Tsukuba, Ibaraki, Japan
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Hashimoto S, Kimura K, Kuramochi T, Aoyagi K, Hirako M, Kawaguchi M, Iwata H, Hirao M, Kitada K, Hirasawa K, Ueda M. Responsiveness of rabbits to superovulation treatment by a single injection of follicle-stimulating hormone with aluminum hydroxide gel. Mol Reprod Dev 2007; 74:1208-12. [PMID: 17290410 DOI: 10.1002/mrd.20672] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Aluminum hydroxide gel (Al-gel), which is used as an adjuvant, can absorb macromolecules. We investigated the applicability of Al-gel to the sustained release of follicle-stimulating hormone (FSH) as a simplified method of superovulation (SOV) in rabbits. The responsiveness of rabbits to SOV by a single injection of FSH dissolved in Al-gel suspension (3.2 mg Al/ml) and in 10% (w/v) polyvinylpyrrolidone (PVP), and by multiple injections of FSH in saline was examined. The numbers of total and fertilized eggs recovered from rabbits treated with FSH in Al-gel (40.5 and 26.3, respectively) were similar to multiple injections (47.4 and 28.6, respectively) and were significantly greater (P < 0.05) than single injection of FSH with PVP (17.3 and 11.5, respectively). We also compared the plasma FSH levels of rabbits which were induced SOV by multiple or a single injection of Al-gel. Al-gel provided sustained release of FSH to the blood stream at a high enough dose for SOV. Moreover, the developmental competence of the pups of DNA-injected embryos from rabbits treated with a single injection of FSH mixed with Al-gel (18%) was similar to that of DNA-injected embryos, recovered from rabbits treated with FSH dissolved in saline (21%). Two transgenic pups were obtained from embryos recovered from rabbits by a single injection of FSH with Al-gel. These results indicate that a single injection of FSH with Al-gel is an effective method for SOV of rabbit and that this technique is applicable to research requiring large numbers of rabbit embryos such as the production of transgenic rabbits.
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Kaneko T, Kimura S, Nakagata N. Offspring derived from oocytes injected with rat sperm, frozen or freeze-dried without cryoprotection. Theriogenology 2007; 68:1017-21. [PMID: 17804050 DOI: 10.1016/j.theriogenology.2007.07.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Accepted: 07/01/2007] [Indexed: 11/18/2022]
Abstract
Sperm preservation is a valuable technique for maintaining genetic resources in biomedical research. In the present study, 10mM Tris-HCl and 1mM EDTA (TE buffer; a simple solution without cryoprotection), was used to freeze or freeze-dry rat sperm. The results were compared with rat sperm frozen using a solution containing Equex STM and egg yolk. Sperm from Wistar and Sprague-Dawley (SD) rats were evaluated by injecting them individually into oocytes derived from the same strain. Of the oocytes that survived after sperm injection, more than 94% were fertilized in all treatments of both strains. In the Wistar rat, 27, 20, 43, and 30% of 2-cell embryos developed to blastocysts, and 35, 9, 11, and 14% of 2-cell embryos developed to offspring from oocytes injected with fresh, frozen (Equex STM/egg yolk), frozen (TE buffer), and freeze-dried sperm, respectively. Using the analagous sources of sperm in the SD rat, 45, 14, 27, and 7% of 2-cell embryos developed to blastocysts, and 22, 0, 14, and 4% of 2-cell embryos developed to offspring. These results demonstrated that rat sperm could be frozen or freeze-dried using TE buffer. We concluded that this simple preservation method, in which cryoprotection was not required, allowed sperm to be preserved efficiently with maintenance of their fertilizing ability.
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Affiliation(s)
- T Kaneko
- Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, 2-2-1 Honjo, Kumamoto, Japan.
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Abstract
The mouse is a genetically tractable model organism widely used to study mammalian development and disease. However, mouse metaphase II (mII) oocytes are exquisitely sensitive and intracytoplasmic sperm injection (ICSI) with conventional pipettes generally kills them. This problem can be solved with piezo-actuated micromanipulation, in which the piezo-electric effect (crystal deformation in response to an externally applied voltage) propels a microinjection needle tip forward in a precise and rapid movement. Piezo-actuated micromanipulation enhances the penetration of membranes and matrices, and mouse ICSI is a major application. Here we describe a comprehensive, step-by-step mouse piezo ICSI protocol for non-specialists that can be completed in 2-4 h. The protocol is a basic prelude to multiple applications, including nuclear transfer cloning, spermatid injection, blastocyst injection, mII transgenesis, and streamlining micromanipulation in primates and livestock. Moreover, piezo ICSI can be used to obtain offspring from 'dead' (non-motile) sperm, enabling trivial sperm freezing protocols for mouse strain storage and shipment.
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Affiliation(s)
- Naoko Yoshida
- Laboratory of Mammalian Molecular Embryology, RIKEN Center for Developmental Biology, 2-2-3 Minatojima Minamimachi, Chuo-ku, Kobe 650-0047, Japan
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48
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Moreira PN, Pozueta J, Pérez-Crespo M, Valdivieso F, Gutiérrez-Adán A, Montoliu L. Improving the generation of genomic-type transgenic mice by ICSI. Transgenic Res 2007; 16:163-8. [PMID: 17372844 DOI: 10.1007/s11248-007-9075-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Accepted: 01/17/2007] [Indexed: 10/23/2022]
Abstract
Transgenes included in genomic-type constructs, such as yeast artificial chromosomes (YAC), P1-derived artificial chromosomes, or bacterial artificial chromosomes (BAC), are normally correctly expressed, according to the endogenous expression pattern of the homologous locus, because their large size usually ensures the inclusion of all regulatory elements required for proper gene expression. The use of these large genomic-type transgenes is therefore the method of choice to overcome most position effects, commonly associated with standard-type transgenes, and to guarantee the faithful transgene expression. However, in spite of the different methods available, including pronuclear microinjection and the use of embryonic stem cells as vehicles for genomic transgenes, the generation of transgenic animals with BACs and, particularly, with YACs can be demanding, because of the low efficiencies requiring extensive microinjection sessions and/or higher number of oocytes. Recently, we have explored the use of intracytoplasmic sperm injection (ICSI) into metaphase II oocytes as an alternative method for the generation of YAC transgenic mice. Our results suggest that the use of transgenic strategies based on ICSI significantly enhances the efficiency of YAC transgenesis by at least one order of magnitude.
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Affiliation(s)
- Pedro N Moreira
- Department of Animal Reproduction, INIA, Madrid, 28040, Spain
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Si W, Benson JD, Men H, Critser JK. Osmotic tolerance limits and effects of cryoprotectants on the motility, plasma membrane integrity and acrosomal integrity of rat sperm. Cryobiology 2006; 53:336-48. [PMID: 17084388 DOI: 10.1016/j.cryobiol.2006.09.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 09/07/2006] [Accepted: 09/07/2006] [Indexed: 11/28/2022]
Abstract
Osmotic stress is an important factor that can result in cell damage during cryopreservation. The objectives of this study were to determine: (1) isosmotic sperm cell volume; (2) osmotically inactive volume; (3) osmotic tolerance limits of rat sperm; and (4) the effects of addition and removal of glycerol (Gly), ethylene glycol (EG), propylene glycol (PG) or dimethyl sulfoxide (Me(2)SO) on rat sperm function. Sperm from Fischer 344 and Sprague-Dawley rats were used in this study. An electronic particle counter was used to measure the cell volume of rat sperm. Computer-assisted sperm motility analysis and flow-cytometric analysis were used to assess sperm motility, plasma membrane and acrosomal integrity. The isosmotic sperm cell volumes of the two strains were 37.0+/-0.1 and 36.2+/-0.2 microm(3), respectively. Rat sperm behaved as linear osmometers from 260 to 450 mOsm, and the osmotically inactive sperm volumes of the two strains were 79.8+/-1.5% and 81.4+/-2.2%, respectively. Rat sperm have very limited osmotic tolerances. The sperm motility and the sperm plasma membranes of both strains were sensitive to anisosmotic treatments, but the acrosomes of both strains were more sensitive to hyposmotic than hyperosmotic conditions. The one-step addition and removal of Me(2)SO showed the most deleterious effect on rat sperm motility, plasma membrane integrity, and acrosomal integrity among the four cryoprotectants. These data characterizing rat sperm osmotic behavior, osmotic and cryoprotectant tolerance will be used to design cryopreservation protocols for rat sperm.
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Affiliation(s)
- Wei Si
- Comparative Medicine Center, Research Animal Diagnostic Laboratory, College of Veterinary Medicine, University of Missouri, 1600 East Rollins Street, Columbia, MO 65211, USA
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Shinohara T, Kato M, Takehashi M, Lee J, Chuma S, Nakatsuji N, Kanatsu-Shinohara M, Hirabayashi M. Rats produced by interspecies spermatogonial transplantation in mice and in vitro microinsemination. Proc Natl Acad Sci U S A 2006; 103:13624-8. [PMID: 16945902 PMCID: PMC1564227 DOI: 10.1073/pnas.0604205103] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Spermatogonial transplantation has demonstrated a unique opportunity for studying spermatogenesis and provided an assay for spermatogonial stem cells. However, it has remained unknown whether germ cells that matured in a xenogeneic environment are functionally normal. In this investigation, we demonstrate the successful production of xenogeneic offspring by using spermatogonial transplantation. Rat spermatogonial stem cells were collected from immature testis and transplanted into the seminiferous tubules of busulfan-treated nude mouse testis. Using rat spermatids or spermatozoa that developed in xenogeneic surrogate mice, rat offspring were born from fresh and cryopreserved donor cells after microinsemination with rat oocytes. These offspring were fertile and had a normal imprinting pattern. The xenogeneic offspring production by interspecies germ cell transplantation and in vitro microinsemination will become a powerful tool in animal transgenesis and species conservation.
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Affiliation(s)
- Takashi Shinohara
- Department of Molecular Genetics and Horizontal Medical Research Organization, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan.
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